1 files changed, 26 insertions, 0 deletions
diff --git a/spec/ruby/shared/complex/numeric/imag.rb b/spec/ruby/shared/complex/numeric/imag.rb
new file mode 100644
index 0000000000..caf54e2cf9
--- /dev/null
+++ b/spec/ruby/shared/complex/numeric/imag.rb
@@ -0,0 +1,26 @@
+require File.expand_path('../../../../spec_helper', __FILE__)
+
+describe :numeric_imag, shared: true do
+  before :each do
+    @numbers = [
+      20,             # Integer
+      398.72,         # Float
+      Rational(3, 4), # Rational
+      bignum_value, # Bignum
+      infinity_value,
+      nan_value
+    ].map{|n| [n,-n]}.flatten
+  end
+
+  it "returns 0" do
+    @numbers.each do |number|
+      number.send(@method).should == 0
+    end
+  end
+
+  it "raises an ArgumentError if given any arguments" do
+   @numbers.each do |number|
+     lambda { number.send(@method, number) }.should raise_error(ArgumentError)
+   end
+  end
+end